Set of twenty-seven heads from 'The Disputa'

A set of twenty-seven etchings reproducing the heads of some of the figures depicted in the fresco of the Disputa (The Disputation of the Holy Sacrament), painted by Raphael around 1508-09 in the Stanza della Segnatura in the Vatican. Each print is lettered along the bottom margin and numbered at top right. Probably from "Tetes choisies de personnages illustres..." published by Paolo Fidanza in Rome in 1785. 

Paolo Fidanza became famous for publishing six volumes of prints of heads after Raphael between 1757 and 1763.